Bumps

So I am 13 weeks and I am definitely showing. I am visiting family back home and have had multiple people call or text my parents to ask if I'm pregnant. I'm trying to hide the belly as I am waiting to surprise my grandparents this coming Sunday! (My parents know). My mom said you can definitely tell it's a pregnancy bump as it's carrying higher than a bloat bump would. My question is, am I the only one showing already?? Lol I feel like everyone says they don't show until 20+ weeks. It almost makes me embarrassed when others ask and can see. I can't botton my pants and I'm wearing flowy, long shirts to try to hide until we officially announce!